Inspection Procedure

CHECK THAT MILL IS ILLUMINATED

Result

RESULT REFERENCE TABLE

Condition	Proceed to
MIL. remains ON	A
MIL does not illuminate	B

B: Go to step 5

A: Go to next step

CHECK WHETHER MIL TURNS OFF
1. Connect the intelligent tester to the DLC3 with CAN VIM.
2. Turn the ignition switch ON and turn the intelligent tester ON.
3. Check whether any DTCs have been stored (See DIAGNOSTIC TROUBLE CODE TABLE ). Note them down if necessary.
4. Clear the DTC (See DTC CHECK/CLEAR ).
5. Check if the MIL turns off.
  OK:
  
  MIL should turn off.
OK: REPAIR CIRCUIT INDICATED BY OUTPUT DTC

NG: Go to next step
CHECK HARNESS AND CONNECTOR (CHECK FOR SHORT IN WIRE HARNESS)

Fig 1: Identifying E8 ECM Connector Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.
1. Disconnect the E8 ECM connector.
2. Turn the ignition switch ON.
3. Check that the MIL is not illuminated.
  OK:
  
  MIL is not illuminated.
OK: REPLACE ECM

NG: Go to next step
CHECK HARNESS AND CONNECTOR (COMBINATION METER - ECM)
1. Check the harness and connector.
OK: REPAIR OR REPLACE COMBINATION METER

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
CHECK THAT MIL IS ILLUMINATED
1. Check that the MIL is illuminated when turning the ignition switch ON.
  OK:
  
  MIL is illuminated.
OK: SYSTEM OK

NG: Go to next step

CHECK THAT ENGINE STARTS

Start the engine.

Result

RESULT REFERENCE

Result	Proceed to
Engine starts	A
Engine does not start*	B
HINT: *: The intelligent tester cannot communicate with the ECM.

A: Go to next step

INSPECT COMBINATION METER (MIL CIRCUIT)
1. See the combination meter troubleshooting section (See HOW TO PROCEED WITH TROUBLESHOOTING ).
NG: REPAIR OR REPLACE COMBINATION METER

OK: CHECK AND REPLACE HARNESS OR CONNECTOR (COMBINATION METER - ECM)